f 



CORKESrONDING SOCIETIKS. 39 



town and its effect on vegetation and the health of the community.' The 

 investigation was going on, and the report would be published by the 

 Society ; if any of the Delegates desired copies he would be happy to 

 forward them on application. He suggested that other towns might be 

 induced to carry on similar work. 



The Chairman said that the Manchester Corporation had recently 

 started a meteorological observatory in the centi-e of the town under the 

 guidance of Dr. Tatham. He referred to the use of ozone papers, which 

 had been shown by chemists to be coloured by several other gases besides 

 ozone. Thirty years ago he had made some experiments in London with 

 identical test-papers, which had been exposed in ditJerent parts of the 

 town. He found that, in whichever direction the wind blew, the air 

 coming from the country always coloured the papers more or less, but 

 air which had passed over the town always lost the power of colouring 

 the papers. It appeared to him that some simple test of this kind w^s 

 wanted if it could only be made reliable. Mr. Symons also called atten- 

 tion to the fact that the Royal Horticultural Society had appointed n 

 Committee for investigating the atmosphere of London in relation to 

 fog and plant life. 



Dr. Mill referred to the excellent work which the late Professor 

 Carnelley had carried out in connection with the determination of the 

 number of micro-organisms present in the atmosphere of rooms, &c. 



Section C. 



Geological Plwtography. — Mr. A. S. Reid said that their Committee 

 had met since the last Conference, and had arrived at certain conclusions, 

 which would be made known in due course. They had applied for a 

 grant for the purpose of mounting the photographs, and a systematic 

 method had been agreed upon, so that the prints could be mounted and 

 handled without injury. The subject of lantern slides had been men- 

 tioned, but they had decided that the collecting of these did not come 

 within their province. 



Earth Tremors. — The Chairman stated that this Committee had during 

 the past year been collecting apparatus and diagrams of apparatus for 

 recording earth tremors. They had not yet come to any decision as to 

 the best form of instrument, and they would be glad of any suggestions 

 Irom those interested in the subject.^ Application had been made lor 

 leappointment without a grant. 



Section D. 



Disappearance of Native Plants. — The Rev. E. P. Knnbley reported 

 that the Committee had been reappointed. From what had been said 

 at the last meeting of the Conference he said that he might conclude 

 that it was the wish of the Delegates that the reports from the North of 

 England and Scotland should be incorporated in next year's report. 

 The Committee for investigating the Invertebrate Fauna and Cryptogamic 

 Flora of the British Isles had not been reappointed. 



Destruction of Wild Birds' Eggs. — Dr. Vachell said that this subject 



' The Town Gardening Committee of the Manchester Field Naturalists' and 

 Archajologists' Society. The Secretarj' is Mr. Alfred Griffiths, IG Kennedy Street, 

 Albert Square, Manchester [Sec. Corres. Soc. Comm.]. 



- The Secretary of the Committee is Mr. C. Davison, 38 Charlotte Road, Bir- 

 mingham. 



